Monolinuron

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  • Identifiers

    CAS number
    1746-81-2

    Molecular formula
    C9H11ClN2O2

    SMILES
    CN(C(=O)NC1=CC=C(C=C1)Cl)OC

    Safety labels

    Irritant
    Irritant

    Health Hazard
    Health

    Environmental Hazard
    Environmental

  • Odor profile

    Fragrance
    Grape 39.77%
    Odorless 36.62%
    Fruity 32.82%
    Citrus 28.78%
    Savory 28.45%
    Meaty 27.9%
    Grapefruit 25.81%
    Cooked 24.35%
    Milky 23.43%
    Sweet 22.87%

     

    Flavor
    Odorless 40.1%
    Fruity 38.01%
    Bitter 32.19%
    Mild 31.04%
    Roasted 23.0%
    Cooked 22.74%
    Orange flower 20.42%
    Bland 20.18%
    Very mild 20.13%
    Sweet-like 19.57%

     

    Odor impact est.
    Odorless

  • Properties

    XLogP3-AA
    2.3

    pKa est.
    6.54 (neutral)

    Molecular weight
    214.65 g/mol

    Vapor pressure est.

    • hPa @ 20°C
    • hPa @ 25°C

    Evaporation rate
    Ultra slow

    Boiling point est.
    386°C

    Melting point expt.

    • 80-83 °C
    • Brownish flakes; faint smell of amine; vapor pressure 1.1X10-5 mm Hg at 20 °C; MP: 75-78 °C /technical grade 92% AI/

    Flash point

    • 133.08 ˚C est.

    Solubility expt.

    • 735 ppm in water at 20 °C; sol in alcohol, acetone, benzene, toluene
    • SOL IN DIOXANE, & XYLENE
    • Water solubility = 930 mg/l at 20 °C.
    • Readily soluble in chloroform, diethyl ether.
    • Solubility in water: none

  • Synonyms

    • MONOLINURON
    • 1746-81-2
    • 3-(4-Chlorophenyl)-1-methoxy-1-methylurea
    • Monorotox
    • Arezin
    • Arezine
    • Premalin
    • Aresin
    • Urea, N'-(4-chlorophenyl)-N-methoxy-N-methyl-
    • Caswell No. 207D
    • Monolinuron [BSI:ISO]
    • HOE 2747
    • Arresin
    • Afesin
    • HSDB 5030
    • Urea, 3-(p-chlorophenyl)-1-methoxy-1-methyl-
    • UNII-6KJJ4XAD6M
    • 6KJJ4XAD6M
    • 3-(p-Chlorophenyl)-1-methoxy-1-methylurea
    • N'-(4-Chlorophenyl)-N-methoxy-N-methylurea
    • N-(4-Chlorophenyl)-N'-methoxy-N-methylurea
    • EINECS 217-129-5
    • HOE 02747
    • EPA Pesticide Chemical Code 207500
    • BRN 2212523
    • DTXSID0037576
    • MONOLINURON [MI]
    • 3-(4-Chlorphenyl)-1-methoxy-1-methylharnstoff
    • MONOLINURON [ISO]
    • MONOLINURON [HSDB]
    • 3-(4-Chlorphenyl)-1-methoxy-1-methylharnstoff [German]
    • DTXCID8017576
    • CHEBI:81965
    • 1-(4-chlorophenyl)-3-methoxy-3-methylurea
    • 1-Methoxy-1-methyl-3-(4-chlorophenyl)urea
    • 3-(4-CHLORPHENYL)-1-METHOXY-1-METHYLHARNSTOFF (GERMAN)
    • MFCD00055264
    • Monolinuron 10 microg/mL in Acetonitrile
    • Monolinuron 100 microg/mL in Acetonitrile
    • SCHEMBL65568
    • MLS000058831
    • CHEMBL1320234
    • HMS2402C08
    • 3(pChlorophenyl)1methoxy1methylurea
    • BCP05312
    • 3(4Chlorophenyl)1methoxy1methylurea
    • Tox21_301360
    • N(4Chlorophenyl)N'methoxyNmethylurea
    • AKOS001686898
    • Urea, 3(pchlorophenyl)1methoxy1methyl
    • SDCCGMLS-0013702.P002
    • Urea, N'(4chlorophenyl)NmethoxyNmethyl
    • 3(4Chlorphenyl)1methoxy1methylharnstoff
    • s10380
    • NCGC00255518-01
    • DS-16467
    • SMR000069097
    • CAS-1746-81-2
    • CS-0151364
    • M3269
    • NS00010426
    • C18794
    • Monolinuron, PESTANAL(R), analytical standard
    • Q6901670
    • 217-129-5

  • Applications

    Monolinuron, CAS 1746-81-2, is a selective herbicide in agriculture belonging to the urea class, used to control weeds in crops by inhibiting photosystem II. Formulated for agricultural use in emulsifiable concentrates (EC), suspension concentrates (SC), or wettable powders (WP), it is typically applied as a foliar spray or soil treatment as part of integrated weed management to reduce weed competition and protect yields.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 64.54
    methanol 78.83
    isopropanol 56.85
    water 1.45
    ethyl acetate 66.91
    n-propanol 49.38
    acetone 120.49
    n-butanol 41.34
    acetonitrile 73.08
    DMF 322.05
    toluene 36.61
    isobutanol 32.89
    1,4-dioxane 245.54
    methyl acetate 101.88
    THF 184.89
    2-butanone 115.68
    n-pentanol 36.06
    sec-butanol 54.35
    n-hexane 0.42
    ethylene glycol 19.77
    NMP 113.96
    cyclohexane 1.6
    DMSO 216.64
    n-butyl acetate 26.72
    n-octanol 15.09
    chloroform 168.78
    n-propyl acetate 33.97
    acetic acid 89.36
    dichloromethane 173.15
    cyclohexanone 117.29
    propylene glycol 31.3
    isopropyl acetate 26.95
    DMAc 492.1
    2-ethoxyethanol 126.72
    isopentanol 33.64
    n-heptane 0.81
    ethyl formate 73.62
    1,2-dichloroethane 90.78
    n-hexanol 24.58
    2-methoxyethanol 185.94
    isobutyl acetate 20.99
    tetrachloromethane 9.4
    n-pentyl acetate 18.26
    transcutol 157.43
    n-heptanol 15.34
    ethylbenzene 21.09
    MIBK 30.55
    2-propoxyethanol 73.21
    tert-butanol 79.4
    MTBE 37.51
    2-butoxyethanol 43.85
    propionic acid 41.33
    o-xylene 26.84
    formic acid 70.88
    diethyl ether 27.64
    m-xylene 18.26
    p-xylene 34.41
    chlorobenzene 44.67
    dimethyl carbonate 39.17
    n-octane 0.69
    formamide 154.29
    cyclopentanone 113.43
    2-pentanone 53.76
    anisole 75.67
    cyclopentyl methyl ether 40.24
    gamma-butyrolactone 123.63
    1-methoxy-2-propanol 102.38
    pyridine 190.91
    3-pentanone 45.7
    furfural 181.85
    n-dodecane 0.99
    diethylene glycol 78.21
    diisopropyl ether 5.09
    tert-amyl alcohol 57.92
    acetylacetone 75.09
    n-hexadecane 1.14
    acetophenone 76.89
    methyl propionate 62.46
    isopentyl acetate 27.19
    trichloroethylene 211.39
    n-nonanol 15.69
    cyclohexanol 42.54
    benzyl alcohol 81.35
    2-ethylhexanol 15.59
    isooctanol 13.82
    dipropyl ether 12.86
    1,2-dichlorobenzene 41.06
    ethyl lactate 28.5
    propylene carbonate 60.68
    n-methylformamide 120.91
    2-pentanol 22.32
    n-pentane 0.38
    1-propoxy-2-propanol 42.24
    1-methoxy-2-propyl acetate 39.76
    2-(2-methoxypropoxy) propanol 54.01
    mesitylene 8.99
    ε-caprolactone 86.42
    p-cymene 10.07
    epichlorohydrin 171.96
    1,1,1-trichloroethane 55.94
    2-aminoethanol 43.62
    morpholine-4-carbaldehyde 221.87
    sulfolane 118.03
    2,2,4-trimethylpentane 0.89
    2-methyltetrahydrofuran 90.0
    n-hexyl acetate 25.1
    isooctane 0.42
    2-(2-butoxyethoxy)ethanol 64.39
    sec-butyl acetate 21.87
    tert-butyl acetate 30.56
    decalin 1.59
    glycerin 54.78
    diglyme 133.01
    acrylic acid 45.64
    isopropyl myristate 12.57
    n-butyric acid 55.87
    acetyl acetate 39.23
    di(2-ethylhexyl) phthalate 19.54
    ethyl propionate 32.61
    nitromethane 199.59
    1,2-diethoxyethane 48.64
    benzonitrile 67.15
    trioctyl phosphate 11.28
    1-bromopropane 27.32
    gamma-valerolactone 211.97
    n-decanol 12.82
    triethyl phosphate 22.25
    4-methyl-2-pentanol 12.98
    propionitrile 54.11
    vinylene carbonate 73.81
    1,1,2-trichlorotrifluoroethane 138.83
    DMS 33.66
    cumene 12.93
    2-octanol 11.46
    2-hexanone 44.3
    octyl acetate 16.78
    limonene 13.02
    1,2-dimethoxyethane 222.11
    ethyl orthosilicate 20.09
    tributyl phosphate 14.08
    diacetone alcohol 56.34
    N,N-dimethylaniline 51.68
    acrylonitrile 85.69
    aniline 72.26
    1,3-propanediol 70.52
    bromobenzene 37.35
    dibromomethane 75.93
    1,1,2,2-tetrachloroethane 156.73
    2-methyl-cyclohexyl acetate 28.19
    tetrabutyl urea 24.32
    diisobutyl methanol 9.76
    2-phenylethanol 46.56
    styrene 29.51
    dioctyl adipate 24.11
    dimethyl sulfate 70.7
    ethyl butyrate 26.96
    methyl lactate 41.77
    butyl lactate 23.41
    diethyl carbonate 24.15
    propanediol butyl ether 40.68
    triethyl orthoformate 24.15
    p-tert-butyltoluene 9.85
    methyl 4-tert-butylbenzoate 40.22
    morpholine 233.84
    tert-butylamine 26.77
    n-dodecanol 10.3
    dimethoxymethane 139.54
    ethylene carbonate 54.82
    cyrene 67.91
    2-ethoxyethyl acetate 35.6
    2-ethylhexyl acetate 21.59
    1,2,4-trichlorobenzene 55.2
    4-methylpyridine 162.07
    dibutyl ether 16.5
    2,6-dimethyl-4-heptanol 9.76
    DEF 96.68
    dimethyl isosorbide 80.79
    tetrachloroethylene 81.8
    eugenol 50.87
    triacetin 36.33
    span 80 36.55
    1,4-butanediol 34.53
    1,1-dichloroethane 75.86
    2-methyl-1-pentanol 33.86
    methyl formate 99.23
    2-methyl-1-butanol 31.75
    n-decane 1.37
    butyronitrile 52.48
    3,7-dimethyl-1-octanol 16.33
    1-chlorooctane 7.74
    1-chlorotetradecane 3.93
    n-nonane 1.03
    undecane 1.13
    tert-butylcyclohexane 1.36
    cyclooctane 0.51
    cyclopentanol 44.91
    tetrahydropyran 107.89
    tert-amyl methyl ether 31.23
    2,5,8-trioxanonane 102.42
    1-hexene 4.84
    2-isopropoxyethanol 68.83
    2,2,2-trifluoroethanol 48.36
    methyl butyrate 50.96

    Scent© AI

1 4

IFRA standard 51

Recommendation
No restriction
Maximum acceptable concentrations in the finished product (%)
Category 1
Products applied to the lips
 No restriction Category 7A
Rinse-off products applied to the hair with some hand contact
 No restriction
Category 2
Products applied to the axillae
 No restriction Category 7B
Leave-on products applied to the hair with some hand contact
 No restriction
Category 3
Products applied to the face/body using fingertips
 No restriction Category 8
Products with significant anogenital exposure
 No restriction
Category 4
Products related to fine fragrance
 No restriction Category 9
Products with body and hand exposure, primarily rinse off
 No restriction
Category 5A
Body lotion products applied to the body using the hands (palms), primarily leave on
 No restriction Category 10A
Household care products with mostly hand contact
 No restriction
Category 5B
Face moisturizer products applied to the face using the hands (palms), primarily leave on
 No restriction Category 10B
Household care products with mostly hand contact, including aerosol/spray products (with potential leave-on skin contact)
 No restriction
Category 5C
Hand cream products applied to the hands using the hands (palms), primarily leave on
 No restriction Category 11A
Products with intended skin contact but minimal transfer of fragrance to skin from inert substrate without UV exposure
 No restriction
Category 5D
Baby Creams, baby Oils and baby talc
 No restriction Category 11B
Products with intended skin contact but minimal transfer of fragrance to skin from inert substrate with potential UV exposure
 No restriction
Category 6
Products with oral and lip exposure
 No restriction Category 12
Products not intended for direct skin contact, minimal or insignificant transfer to skin
 No restriction